1. Department of Otorhinolaryngology Centre Hospitalier Universitaire Sainte‐Justine Montreal Canada
2. Division of Otolaryngology–Head and Neck Surgery Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.
3. Department of Otolaryngology Brooke Army Medical Center San Antonio Texas U.S.A.
4. Division of Anesthesia Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.
5. Department of Radiology Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.
6. Division of Pulmonary Medicine Cincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A.
7. Department of Otolaryngology–Head and Neck Surgery University of Cincinnati College of Medicine Cincinnati Ohio U.S.A.